Party B
Bas Relief 2 - to the side of the passage there's stairs going up (I assume you continue)
Bas Relief 3 - Door leads to a passage.
Bas Relief 4 - Dead end (can eat/regain 1 spell)
After resting you search for secret doors and find one
Bas Relief 5 - opens into a 20'x20' dead end room, after entering, the door closes, you notice buttons next to the door with the numbers 1, 2, 3, 4, 5. There's a slot with a piece of metal sticking out with a red triangle mounted on the end, one of the triangle's points is pointing to button 3.